Dishwashing machine



Sept. 19, 1933. w. l.. LINDGREN DISHWASHING MACHINE med oct, 15, 1931 3 Sheets-Sheet l Sept- 19, 1933- w. L. LINDGREN 1,927,461

DI SHWASHING MACHINE ImfenO/r.-

Sept. 19, 1933. w. l.. LINDGREN 1,927,461

DISHWASHING MACHINE f Filed oct. 15, 1931 5 sheets-sheet 5 lfw A? .4f y? :2f/W g lg 1ww:/1% 1 4 `\`I j f g f f 3134 y i 4:1559

J4 AX m lnlfnanm Patented sept. 19,1933 y l, 1,927,461,

UNITEDnsTATEs gliii'rlsN'r.OFFICE V 1,927,461 DISHWASHING MACHINEV Waldemar L. Lindgren, Waukegan, Ill., assigner of one-half to jJohn E. Ericsson, Chicago, Ill.A`

Applietttionoetober 15, 1931. serial 10,568,970 2 claims; (ci. 19e- 110) My invention is concerned with a conveyor deformed -therein at intervalsthe annular grooves signedprimarily for use in dish washingmachines 21 which receiveu the reduced portions of the of the general type shown in my Patent No. 1,798, apertures 22 formed in thelinks 23, the links and 428, dated March 31, 1931, and as disclosed in rods together cooperating toform a exible, ende V5 an improved form Yin my application No. 509,658, less skeleton-conveyor, which is supported on`its 60 filed January 19, 1931,/and is designed to produce upper run by the ribs 24 projecting inwardly a conveyor for such machines by which the from the upper edge of the side frame members dishes, etc., can be carried past the spraying 15 and 16, and which is carried by the two pairs mechanism at a faster or slower speed, Without of sprocket wheels 25 and 26 secured on theI ends changing the speed of the motor, depending upon of the transverse shafts 27 and 28 journaled in 65 whether the dishes are soiled slightly or badly, suitable bearings formed in the side frames so as to necessitate little or much washing. and 16; The mechanism thus far described does To illustrate my invention, I annex hereto not differ in any substantial details from that three sheets of drawings, in which the same refshown in the aforesaid application No. 509,658. 15 erence characters are used to designate identical The conveyor is driven primarily by the elec-I 70 parts in all the gures, of f which,- tric motor 29 which is supported from the bracket Fig. 1 is a front elevation, partly in section, 30ca1ried by the Casting 12, Which in Gurn iS of a dish-washing machine embodying my imsuitably supported from the sink 10. The motor provements. Y 29 is provided with the customary worm on its 2Q Fig. 2 is a horizontal section, on an enlarged armature Shaft meshing with a Worm gear se- 75 scale, on the line 2-2 of Fig. 1. cured on the substantially Vertical shaft 31, seen Fig. 3 is a Vertical section on the line 3-3 o in dotted lines in Fig. 1, and which extends down.- Fig. 2. wardly through the gear casing 32, seen in sec- Fig. 4 is a vertical section on the line 4-4 of tion .in Figs. 2 and 3, in which is journaled' the Fig. 3, on an enlarged scale; and short shaft 33 having secured thereon the worm 80 Figs. 5 and 6 are vertical` sections on therlines gear wheel 3.4, with which meshes the worm ,35` 5-5 and 6 6, respectively, of Fig. 3. secured on the aforesaid shaft 31.

My invention isl concerned with dish-washing WhereV the conveyor is removable from the machines of the type adapted to be placed in a, sink, it is necessary to provide clutch connec- ,30 sink, and in whichthejconveying mechanism is tions between the shaft 33 and the transverse 85 preferably removabletherefrom when it is not shaft 36 which drives the conveyor, and the cone in use, and I have shown the same as applied to nections arepreferably associated with what a customary kitchen sink 10, which is provided may be .termed a slip clutch, whichoperates to with the hot and cold water mixer 11, outlined in release the conveyor from the motor in case the Y,35 dotted lines in Fig. 1, and from which the water, Conveyor becomes clogged or stopped in any way, 90 after having been mixed, is carried Aby conduits, to prevent breakage. For this purpose, I provide which are preferably formed in a casting 12, as -the connections best shown in Figs.V 2 to 6, inseen in the aforesaid application No. 509,653, to elusive, where the shaft 33 has pinned onr the the pairs of soapy-water'sprayers 13 and` the outer `end thereof the disk-like .clutch member 40 clear-waterk rinsing sprayers 14, the sprayers be- 37, which has the clutchV tooth 38 Aprojecting 95 ing preferably vpivotally mounted in the casting outwardly from the face of the disk 37 and :oc- 12 so that Athey can be turned at right angles cupying the .same vertical plane as the hub-like to their operative position shown in Fig. 1, so as extension 39 thereof which is employed to furnish to be out of the wayl when the sink is ordinarily a :bearing for the adjacent end of the shaft 36,

used, which also has the bearing 40 in the side frame 100 The conveying'k mechanism, which is preferably 15.. The clutch tooth 41 cotoperating with the supported in the sink, and removable therefrom, tooth .38 is formed on the adjacent end of the in the manner shown in the aforesaid patent split-sleeve member 42, which has the two set and application, consists of two-side frame memscrews ,43 passing through the apertures in the bers'15 and 16 at the rear and front of the sink, portion 44V and threaded into apertures in the 105 respectively, which members are connected by `portion 45. vIn the ,split between these portions the transverse elements 17, 18'and 19, asclearly `44 and 45,;I placeV the metal strip 46, whichis shown in the aforesaid patent and application. initially of the proper thickness so that when the The skeleton conveyor is preferably formed of l. screws 43 are tightened up to clamp it securely .the plurality of transverse rods .20, which have `between the parts 44 and 45, the slip-clutch 110 rods 20 to drive the skeleton conveyor.

member 42 will be secured on the shaft r36 with suflicient friction so that the shaft 36 will be rotated against any ordinary resistance offered by the conveying mechanism, but which will give way and slip in case abnormal resistance is met with. To prevent possible longitudinal movement of the slip clutch on the shaft 36, in case the slip occurs, I provide the tongue 47 on the strip 46, which tongue enters the annular groove 48 formed in the shaft 36 to receive it. In case the slip clutch becomes too loose as the result of Wear, when slips occur, the strip 46 can be removed and ground thinner, or it-can bereplaced by another strip, so thatthe normal connection will still be secure.

In order to drive the conveying mechanism at two different speeds, I provide the change gearing best shown in Figs. 2, 3 and 4, where it will be seen that the outer end of the shaft 36 is journaledin a bearing in vthegear casing49, which also has journaled therein the hub 50 of the spur gear wheel 5l, which `isprovided with the clutch tooth 52 projecting rearwardly therefrom. The hub 50 has an annular groove therein to receive' the plates 53 extending thereinto and secured to the outer face of the gear casing 49 by screws, as shown, to prevent longitudinal movement of the wheel 51 on the shaft 54 on which it is journaled. This shaft 54 has the handle 55 on its outer end, by which it is pulled in and out through its bearing 56 formed in the sideV plate 16, and the shaft 54 has splined thereon the driving sprocket wheel 57, the teeth of which engage the The shaft 54 has pinned on it toward the center of the gear casing the clutch disk 58, which has the clutch pins 59 and 60 projecting therefrom rearwardly and forwardly, respectively, the pin 60 being adapted to engage the pin 52 on the gear 51, while the pin 59 is adapted to engage ythe clutch pin 61 projecting outwardly from the spur gear wheelL 62, the hub of which is pinned on the outer end of the shaft 36, and which also furnishes a bearing for the inner end of the shaft 54. The clutch gear wheel 62 meshes with the smaller gear wheel 63, which is pinned on the 'countershaft 64 journaled in the lower end of the gear casing 49, and also having pinned thereon the larger spur gear wheel 65 meshing with the spur gear wheel 51.

As clearly shown in `the drawings, the gear casing 49 is formed of a casting made of two halves-secured together by screws 72, and it is supported from the side frame 16 by the diagonally extending bars 73 secured at their inner ends to the central portion of the gear casing, and by screws at their outer ends to the lugs 74 projecting inwardly from the side frame members 16.

With the foregoing construction, it will be apparent that when the handle 55 is in the neutral position shown in Fig. 3, the conveyor mechanism will be at rest, although the motor is rotating. When the handle 55 is Vshoved inwardly fromthe Y `neutral position shown, the clutch teeth 59 and f into play. This mechanism is very useful', as it furnishes a means for4 starting and stopping the conveyor without interfering with the rotation of the motor, and also by changing the speed at which the conveyor moves, as it will be obvious that where the dishes are slightly soiled, they can be passed through the machine and suiiiciently washed in less time than where they are badly soiled. It is also useful in that where large dishes and plates are being washed, they can be readily put on and taken off the conveyor while it is operating at the high speed, whereas smaller dishes and cups and glasses cannot be readily handled up to the full capacity of the conveyor unless it is moved at the slower speed.

It will be understood that the water being sprayed on the dishes upwardly from the lower spray members and downwardly from the top spray lmembers carriesv the dirt off of the dishes and downward into the sink, from which the dirty water flows in the customary manner to the customary outlet. To prevent the larger particles of food that may be washed off from going through the outlet of the sink, and possibly eventually clogging the same, I provide the screening mechanism shown in Figs. 1, 2, 3 and 4, which preferably consists of the perforated sheet-metal plate 66, having the preferably upturned ends 67 and 68, andprovided at its edges with the overhanging flanges 69, which co-operate with the outwardly projecting lianges 70 formed on the lower edges of theside members 15 and 16, which are preferably curved toward each other, as seen at 71, in order to accommodate the screen 66 in a narrower' space. As shown in Figs. 1 and 2, the screen 66 necessarily extends from the receiving end well past the center of the conveyor, as it is in this portion that the food is washed oif of the dishes and falls on the screen although it will be understood that I might extend the screen through the entire length of the conveyor, or even beyondV it, if deroo los

iro

sired. The screen thus constructed can be readily slid off of the supporting side members 15 and 16, so that itV can be cleaned.

While I have herein shown and described a novel slip clutch mechanism and a novelremovable screen plate for washing machines, I do not herein claim the same, but reserve them for divisional applications.

While I have shown and described my inventionv as embodied in the form whichI at present consider best adapted to carry out its purposes, it will be understood that it is capable of modifications, and that I do not desire to be limited in the interpretation of the following claims except as may be necessitated by the state of the prior art.

What I claim as new, and desire to secure by Letters Patent of the United States, is:

1. In an apparatus of the class described, the combination with a framework, of a driven memiso ber mounted to move therein, a gear casing supwise journaled in the framework and having its adjacent end in the gear casing, a driving wheel engaging the driven member and splined on the second shaft so that the latter can be` moved to and from the drive shaft without Vdisengaging and adjustable by moving the second shaft longitudinally to start or stop, or change the'speed of the driven member.

2. In an apparatus of the class described, the

combination with a framework, of a driven mem- Vthe driving wheel from the driven member, and speed reducing gearing connecting the two shafts ber mounted to move therein, a gear casing supported by and within the framework, a drive shaft journaled in the framework and having one end in the gear casing,` a complementary shaft in axial alignment with the drive shaft and likewise journaled in the framework and having its adjacent end in the gear casing, a driving wheel engaging the driven member and splined on the second shaft so that the latter can be moved to and from the drive shaft without disengaging the driving wheel from; the driven member, and speed reducing gearing connecting the two shafts and adjustable by moving the second shaft longitudinally to start or stop, or change the speed of the driven member, said speed reducing gearing consisting of a large spur gear wheel provided with a clutch tooth secured on the drive shaft, a smaller spur gear wheel provided with a clutch tooth mounted to rotate on the second shaft, a countershaft, a pair of large and smaller spur gear wheels secured on the countershaft and meshing with the previously mentioned smaller and larger spur gear wheels, respectively, and a clutch disk provided with a clutch tooth secured on the second shaft and adapted to engage the clutch teeth of either of the spur gear wheels provided with clutch teeth;

WALDEMAR L. LINDGREN. 

